Mass and Weight

The difference between mass and weight is often a cause of confusion for people. The mass of an object is the amount of matter in that object and remains constant. Mass is measured is kilograms (kg). The weight of an object on the other hand is the effect of gravity on that object and is measured in newtons (N).

On Earth, a mass of 1kg has a weight of 10N, a mass of 60kg would therefore have a weight of 600N. The weight of the same object on the moon is much less. The mass will remain the same and because the gravitational effect of the Moon is about one sixth that of the Earth the weight of that same object will also be about one sixth. Our mass of 60kg would still have a mass of 60kg on the Moon but would weigh about 100N.

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